US4311058A - Device for transforming rotational movement into linear movement or the reverse - Google Patents

Device for transforming rotational movement into linear movement or the reverse Download PDF

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Publication number
US4311058A
US4311058A US06/097,944 US9794479A US4311058A US 4311058 A US4311058 A US 4311058A US 9794479 A US9794479 A US 9794479A US 4311058 A US4311058 A US 4311058A
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US
United States
Prior art keywords
shaft
support
bearing
opening
openings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/097,944
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English (en)
Inventor
Bengt Lundgren
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKF Nova AB
Original Assignee
SKF Nova AB
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Filing date
Publication date
Application filed by SKF Nova AB filed Critical SKF Nova AB
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Publication of US4311058A publication Critical patent/US4311058A/en
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H19/00—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion
    • F16H19/02—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion
    • F16H19/025—Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion for interconverting rotary or oscillating motion and reciprocating motion comprising a friction shaft
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary

Definitions

  • the present invention relates to a device of the kind described in the introduction of the accompanying claim 1.
  • Such devices are used in many different connections for example in actuators and transport members.
  • the devices are primarily used in the embodiment in which rotation of the shaft or the surrounding support causes displacement of the surrounding support along the shaft or the shaft through the support, respectively. It is known to adjust the speed of displacement either by adjusting the inclination angle of the rings relative to the shaft or by adjusting the rotational speed of the shaft or the support.
  • the invention is primarily but not exclusively intended for devices of the last mentioned kind.
  • each device has to comprise at least three rings which are pressed against the shaft in order to obtain force equilibrium in the most suitable way.
  • two of the rings are pressed in one direction against the shaft, and the third, which is usually situated between the two other rings, is pressed in the opposite direction.
  • the bearings comprising the rings are usually mounted in bearing housings or similar members, which are displaceable in the support in a direction across the shaft and spring loaded so that the rings are urged with a pre-stress against the shaft.
  • a complete device thus comprises a great number of parts, each of which having a relatively complicated shape and therefore being expensive to manufacture with necessary precision. The device is thus expensive and also complicated to mount.
  • the purpose of the present invention is to bring about a device consisting of parts which are easy to manufacture and to handle, which means that the device can be produced inexpensively and be easily mounted. According to the invention this is obtained by giving the device the characteristics which appear from the accompanying claim 1.
  • a device according to the invention may consist of but a few parts, which can be produced quickly and easily and with a good precision.
  • FIG. 1 shows a longitudinal section of a support in a device according to an embodiment of the invention
  • FIG. 2 shows a cross section according to II--II in FIG. 1 of a device provided with a support according to FIG. 1;
  • FIG. 3 shows a side view of a device according to another embodiment of the invention.
  • FIG. 4 shows an end view of such a device
  • FIGS. 5 and 6 show the principles of further embodiments of the invention.
  • the support shown in FIG. 1 consists of a preferably massive body 1, through which a longitudinal bore 2 is extending.
  • a shaft not shown, with a cylindrical envelope surface is extending through the bore.
  • the support is, together with the elements attached to it, displaceable along the shaft.
  • a number of openings 3, 4, 5, 6 are provided across the support.
  • a bearing with a ring which surrounds the shaft and is rotatable in relation to the support is intended to be inserted in each opening.
  • the bore diameter of the ring is larger than the shaft diameter in order to allow a skewed position of the ring in relation to the shaft in accordance with the inclined position of the opening, as appears from the figure.
  • the openings have a constant cross section profile generally corresponding to the axial profiles of those bearings which are intended to be inserted in the respective openings.
  • the support is provided with means for pressing the bearing rings against the shaft provided in the bore 2.
  • An example of a pressing device is shown in FIG. 2.
  • the body of the support 1 has a cylindrical shape and is surrounded by a cylindrical spring 7, which is pre-stressed against the envelope surface of the body 1.
  • a shaft 8 is inserted in the longitudinal bore.
  • a bearing 9 in the shape of a rolling bearing with an outer ring which does not rotate in the body 1 and an inner ring 10 which rotates in relation to the outer ring and which contacts the shaft 8 is inserted in the opening 3 (and, of course, also in the other openings).
  • the bearing is displaceable in the opening 3 and the ring 10 is pressed against the shaft 8 by a block 11 which is inserted in and displaceable in the opening 3.
  • the block is in unloaded state projecting out of the opening 3 from the envelope surface of the body 1 and is pressed against the outer ring of the bearing by the force of the spring 7.
  • the block may be made of an elastically compressible material, so that it will adapt its shape to the surrounding elements under pressure.
  • the support When for example the shaft 8 is rotated, the support is displaced along the shaft if it is prevented from rotating.
  • the support may possibly be rotated, whereby the shaft is displaced axially. It is also possible to move one of the elements axially, whereby the other element is forced to rotate.
  • FIGS. 3 and 4 show a side view in perspective and an end view of a device according to another embodiment of the invention.
  • a shaft 12 is surrounded by a support 13, in which openings, marked by dashed lines in FIG. 3, are provided. Bearings are arranged in the openings in the same manner as described in connection to the FIGS. 1 and 2.
  • the sides of the support 13 are covered by plates 14, 15, which close the openings in the support wall and press the bearings which are situated in the openings radially so that their inner rings are urged against the shaft.
  • the plates may be fastened by screws or the like.
  • the support 13 has such a shape that its cross section area has a constant outline in planes parallel to the shaft and perpendicular to the extension of the openings, i.e.
  • Supports with such a shape can easily be produced by e.g. extrusion of aluminum blanks, whereby the openings can be provided directly at the extrusion procedure.
  • the extruded bar can be cut into desired lengths corresponding to the width of the complete supports, and be provided with a bore for the shaft 12 by a boring operation.
  • a number of supports with only one opening each can be produced and connected into a unit, as shown in FIG. 5.
  • the production of the supports may be carried out in the same manner as described in connection to FIGS. 3 and 4, and the supports 16, 17, 18 can be kept together in a suitable way, for example by axial bolt joints, gluing, welding or by being fixed in a common freeze.
  • devices of the kind in question comprise at least three rings, which contact the shaft.
  • Each support may thus contain three, four or more openings for rings. If a plurality of supports are used together, each support may contain one or possibly two openings.
  • FIG. 6 shows a sketch of the principle of using the invention in a device in which the inclination of the rings in relation to the shaft may be varied.
  • the device comprises a number, three in the embodiment shown, of supports 19, 20, 21, each provided with one opening 22, 23 and 24, respectively, for a bearing with a ring which is pressed against the shaft 25 surrounded by the supports.
  • Each support is in a manner known per se, see e.g. Swedish published patent application No. 7609795-5, tiltable around an axis perpendicular to the shaft 25 and passing through the point of contact between the shaft 25 and the ring provided in the respective support, and the supports are mutually connected by e.g. gear segments 26, 27, 28.
  • the outer shape of the support does not have to be cylindrical or have a constant outline.
  • the rings contacting the shaft do not have to be parts of rolling bearings but may for example be slidingly arranged in the respective supports.
  • the member 7 surrounding the support according to FIG. 2 does not have to be resilient but may be rigid if for example the members 11 are resilient.
  • a separate pre-stressing member may be provided for each opening, e.g. in embodiments of the invention similar to that outlined in connection to FIG. 6.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Friction Gearing (AREA)
  • Transmission Devices (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Support Of The Bearing (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
US06/097,944 1979-01-26 1979-11-27 Device for transforming rotational movement into linear movement or the reverse Expired - Lifetime US4311058A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7900697A SE7900697L (sv) 1979-01-26 1979-01-26 Anordning for omvandling av rotationsrorelse till linjerrorelse eller tvertom
SE7900697 1979-01-26

Publications (1)

Publication Number Publication Date
US4311058A true US4311058A (en) 1982-01-19

Family

ID=20337114

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/097,944 Expired - Lifetime US4311058A (en) 1979-01-26 1979-11-27 Device for transforming rotational movement into linear movement or the reverse

Country Status (7)

Country Link
US (1) US4311058A (de)
JP (1) JPS5912898B2 (de)
DE (2) DE3002383C3 (de)
FR (1) FR2447492A1 (de)
GB (1) GB2040017B (de)
IT (2) IT7923481V0 (de)
SE (1) SE7900697L (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403522A (en) * 1980-02-13 1983-09-13 Skf Industrial Trading & Development Company B.V. Method for making a device for converting a rotary motion into a linear motion
US20090226292A1 (en) * 2006-06-03 2009-09-10 Daimler Ag Processing system for a moving workpiece and method of positioning the processing system
US20090248201A1 (en) * 2006-06-03 2009-10-01 Daimler Ag Processing system for processing a moving workpiece
US20100294063A1 (en) * 2009-05-22 2010-11-25 Gm Global Technology Operations, Inc. Friction damped gears

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3172205D1 (en) * 1980-05-09 1985-10-17 Marldon Eng Spec A traversing unit
DE3219972A1 (de) * 1982-05-27 1983-12-01 Vdo Adolf Schindling Ag, 6000 Frankfurt Waelzmuttergetriebe
DE3302625A1 (de) * 1983-01-27 1984-08-02 Joachim 2300 Molfsee Uhing Offene waelzmutter
GB8608967D0 (en) * 1986-04-12 1986-05-14 Jaguar Cars Mechanical linear actuator
DE59304050D1 (de) * 1993-01-14 1996-11-07 Gaertner Robert Wälzringgewindetrieb
JP4822771B2 (ja) * 2005-08-29 2011-11-24 フルタ電機株式会社 ブロア駆動部の脱落防止機構

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2940322A (en) * 1956-04-19 1960-06-14 Uhing Joachim Rotary translatory motion drive gear
US4008929A (en) * 1974-08-12 1977-02-22 Henrik Gerner Olrik Friction drive device
DE2709006A1 (de) * 1977-03-02 1978-09-07 Uhing Joachim Ing Waelzmutter zur umwandlung einer drehbewegung in eine vorschubbewegung
US4141255A (en) * 1976-05-14 1979-02-27 Skf Nova Ab Mechanism for transferring a rotary motion into an axial motion
US4222619A (en) * 1976-09-06 1980-09-16 Skf Nova Ab Device for transforming a rotational movement into a linear movement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1203079B (de) * 1956-06-26 1965-10-14 Uhing Joachim Ing Reibungsgetriebe zur Umwandlung einer Drehbewegung in eine Vorschubbewegung
IE42317B1 (en) * 1973-12-17 1980-07-16 Olrik H A device for converting rotary motion to axial motion and a method of applying the device for truing, polishing or calibrating a cylindrical body.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2940322A (en) * 1956-04-19 1960-06-14 Uhing Joachim Rotary translatory motion drive gear
US4008929A (en) * 1974-08-12 1977-02-22 Henrik Gerner Olrik Friction drive device
US4141255A (en) * 1976-05-14 1979-02-27 Skf Nova Ab Mechanism for transferring a rotary motion into an axial motion
US4222619A (en) * 1976-09-06 1980-09-16 Skf Nova Ab Device for transforming a rotational movement into a linear movement
DE2709006A1 (de) * 1977-03-02 1978-09-07 Uhing Joachim Ing Waelzmutter zur umwandlung einer drehbewegung in eine vorschubbewegung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403522A (en) * 1980-02-13 1983-09-13 Skf Industrial Trading & Development Company B.V. Method for making a device for converting a rotary motion into a linear motion
US20090226292A1 (en) * 2006-06-03 2009-09-10 Daimler Ag Processing system for a moving workpiece and method of positioning the processing system
US20090248201A1 (en) * 2006-06-03 2009-10-01 Daimler Ag Processing system for processing a moving workpiece
US8250743B2 (en) 2006-06-03 2012-08-28 Daimler Ag Processing system for a moving workpiece and method of positioning the processing system
US20100294063A1 (en) * 2009-05-22 2010-11-25 Gm Global Technology Operations, Inc. Friction damped gears

Also Published As

Publication number Publication date
DE3002383B2 (de) 1981-04-09
GB2040017A (en) 1980-08-20
IT7928403A0 (it) 1979-12-27
DE3002383C3 (de) 1984-04-12
SE7900697L (sv) 1980-07-27
IT7923481V0 (it) 1979-12-27
GB2040017B (en) 1983-01-06
DE3002383A1 (de) 1980-07-31
IT1127749B (it) 1986-05-21
JPS55100456A (en) 1980-07-31
FR2447492A1 (fr) 1980-08-22
JPS5912898B2 (ja) 1984-03-26
FR2447492B1 (de) 1983-12-09
DE8001740U1 (de) 1980-12-18

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